after that, congressman john lewis and the work of the civil rights activist in the 1960s. and thomas mann and norm ornstein on their book of partisanship in congress. >> the tension builds in one of the things that happens during that time is that a soviet submarine is found by american ships. and there are charges on a soviet submarine. a knock out the electrical system. the carbon dioxide is rising. people are passing out inside the submarine. they have no communication with the commander. the commander loads the torpedo, the war started already in the war is starting. they want to launch the nuclear torpedo. fortunately, one of the other commanders on the ship from a lower rank talked him out of it. it might have saved the world. >> of this is so close to the edge. it really was one of the scariest moments after this. >> they said we didn't notice. honestly, we were teenagers. my god, we wouldn't even be here to talk. >> director oliver stone and peter koznick of the untold history of united states senator nunn on 10:00 p.m. eastern on booktv's "after words." part of fo